Mumbai/IBNS, June 1 -- Indian benchmark indices opened sharply higher on Monday but failed to sustain the early momentum as investors turned cautious amid rising geopolitical tensions in the Middle East and a spike in global crude oil prices.

However, the gains proved short-lived, with both indices slipping into the red briefly before recovering marginally to trade in positive territory.

Market sentiment remained volatile as investors closely tracked developments in the Middle East.

Oil prices jumped after Israel reportedly instructed its military to intensify operations in Lebanon, raising concerns that a broader regional conflict could derail ongoing ceasefire and diplomatic efforts involving the United States and Iran.

Rising crude...